WO1996022646A1 - Device and process for aerial selection in a wireless telephone system - Google Patents

Device and process for aerial selection in a wireless telephone system Download PDF

Info

Publication number
WO1996022646A1
WO1996022646A1 PCT/DE1996/000020 DE9600020W WO9622646A1 WO 1996022646 A1 WO1996022646 A1 WO 1996022646A1 DE 9600020 W DE9600020 W DE 9600020W WO 9622646 A1 WO9622646 A1 WO 9622646A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio
antenna
radio transceiver
directional
stationary
Prior art date
Application number
PCT/DE1996/000020
Other languages
German (de)
French (fr)
Inventor
Christoph Euscher
Dietmar Gapski
Klaus-Dieter Pillekamp
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU43845/96A priority Critical patent/AU4384596A/en
Priority to CA002210876A priority patent/CA2210876C/en
Priority to EP96900261A priority patent/EP0804849B1/en
Priority to JP8521962A priority patent/JPH10502784A/en
Priority to US08/860,902 priority patent/US6219563B1/en
Priority to DE59611405T priority patent/DE59611405D1/en
Publication of WO1996022646A1 publication Critical patent/WO1996022646A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the invention relates to a device for carrying out this method.
  • a wireless communication system e.g. A cordless telephone, which consists of a stationary and a mobile radio transceiver, is essentially determined by its transmission power and its receiver sensitivity.
  • the transmission power is usually even in all directions, i.e. almost spherical, radiated, on the one hand to be universally applicable in any environment and on the other hand to achieve the same range in every direction.
  • only a fraction of the transmission energy is directed in the direction of the mobile radio transceiver, ie in the Example of the cordless telephone handset, emitted.
  • the vast majority of transmission energy is not used and can even interfere with third-party devices.
  • the object of the invention is to create a considerably less complex possibility for improving the transmission behavior between the mobile and the stationary radio transceiver of a telecommunication system, in particular a cordless telephone.
  • this form of antenna diversity is to be distinguished from that which is used to counteract fading effects and which is known from German utility model 92 14 455.
  • the antenna diversity method according to the invention is carried out with directional antennas on the part of the stationary radio transceiver of the system, the use of an anti-fading antenna diversity arrangement on the part of the stationary radio transceiver / Receiving device, for example on the base station of a cordless telephone, not possible, unless each directional antenna would be implemented twice.
  • the function of the known anti-fading antenna diversity can, however, be shifted into the mobile radio transceiver of the system, that is to say in the example in the handset of a cordless telephone, or this function can be restricted to the handset.
  • Fig. 1 the known case is shown, in which the transmission power of a stationary radio transceiver, e.g. the base station of a cordless telephone, is emitted evenly in its surroundings or by a mobile radio transceiver, e.g. ie the mobile part of the cordless telephone, radio signals originating from this stationary radio transceiver are received uniformly all round.
  • the antenna 1 thus has a so-called round beam characteristic 2, with which the same range A is achieved in every direction.
  • FIG. 2 shows the division of the area represented by dashed lines with the range A into two subspaces. Each of these two subspaces is illuminated on the part of the stationary radio transceiver by an antenna 3 or 4 with directional characteristics 5 or 6. In this case, depending on the type of antenna diversity, that of the two directional antennas 3 and 4 is active, in the sub-area of which the mobile radio transceiver is located. Since the range A remains the same in the case shown in FIG. 2, the transmission power and the receiver sensitivity of the stationary device can be reduced.
  • FIG. 3 A comparison of FIG. 3, in which, in accordance with FIG. 1, the omnidirectional characteristic 2 of an antenna 1 of a stationary radio transceiver, that is, for example, the base station of a cordless telephone, with the range A 4, in which the same energy is emitted (transmission case) via one of the two directional antennas 7 and 8, respectively when the circuit is activated, or which shows the same receiver sensitivity (reception case) as in the case according to FIG. 3, that the range A 'then reached is increased compared to the range A according to FIG. 3 by the factor V2 with free space expansion.
  • FIGS. 3 and 4 thus show the range gain to be expected with an antenna diversity carried out according to the invention and unchanged transmission power / receiver sensitivity.
  • FIG. 3 shows the range gain to be expected with an antenna diversity carried out according to the invention and unchanged transmission power / receiver sensitivity.
  • the antenna characteristic 9 of the directional antenna 7 shown with a solid line is actively switched, whereas the dashed antenna characteristic 10 of the directional antenna 8 is not active at the moment, since the mobile radio transmission / Receiving device is located in the radio area covered by the directional antenna 7 with the range A '.
  • a concentration of the transmission power on a hemisphere corresponds to the doubling of the power radiated into this hemisphere.
  • a doubling of the transmission power thus corresponds to an increase in the range by a factor of V2.
  • the base station 11 and the mobile part 12 each have an antenna with omnidirectional characteristics 13 and 14, respectively.
  • the distance B between the base station 11 and the mobile part 12 in this example is dimensioned such that radio communication can still be carried out at the intended ranges.
  • FIG. 6 now shows the case as in the invention with the transmission power or the transmission power unchanged compared to the case in FIG.
  • Receiver sensitivity by using an antenna with a directional characteristic 15 in the base station 11 increases the range of the communication system, in the case shown the cordless telephone, by a factor of 2 in the case of free space expansion.
  • the mobile line 12 is still reached by the base station 11 if its distance is considerably greater than the distance B in the case according to FIG. 5, which shows the actual state prior to the invention. If the method according to the invention is not used to increase the range as shown in FIG. 6, the requirements for the receiver sensitivity of the base station 11 and of the handset 12 can be reduced, which generally results in possibilities for reducing costs.
  • the base station 11 therefore transmits here with a radiation power increased by the gain of the directional characteristic 16, so that the sensitivity of the receiver of the handset 12 shown in dashed lines can be reduced.
  • the use of a directional antenna in the base station 11 can also reduce its receiver sensitivity, since the reduced directional characteristic 17 (shown in dashed lines) is still sufficient to be transmitted by the handset 10 Receive signals properly.
  • the transmission power in the base station 11 and in the handset 12 can be reduced. This case is shown in FIG. 8. Because of the lower energy requirement, this leads to an increase in the operating time of the battery-powered handset 12.
  • FIG. 8 the area in which the transmission signal does not fall below a standard level is shown with a solid line. None and the area in which a signal with at least Normpe gel can be received is shown with a dashed line.
  • a smaller transmission power is sufficient there to reach the handset 12 by radio due to the use of a directional characteristic 18 11 with the directional characteristic 19 shown in dashed lines has an increased reception sensitivity.
  • the general rule is that the use of the method according to the invention results in a reduction of the interference radiation. This is because no power is emitted in the sub-room in which the handset 12 is not located, i.e. third-party devices within this subspace are not disturbed. If the method of the invention is not used to increase the range, then the transmission power of the handset 12 can be reduced, as has already been explained above. This reduces the interference effect on external systems in the vicinity of the handset 12.
  • the transmission power and the receiver sensitivity of the base station 11 remain unchanged up to the antenna connection point. However, due to the gaining directional characteristic 20 of the directional antenna in a partial radio space, both the radiation power and the receiver sensitivity effectively increase in this partial radio space.
  • the "larger" effective transmission power of the base station 11 makes it possible to reduce the receiver sensitivity of the mobile part 12. Since it is provided that a base station 11 keeps in contact with several handsets, the cost saving in the receiver of the handset 12 comes into play several times.
  • the "greater" effective sensitivity of the base station 11 also enables the transmission power of the handset 12 to be reduced. On the one hand, this reduces the power consumption of the handset 12, i.e. this results in a longer operating time or you can get by with a smaller and therefore cheaper battery. On the other hand, the interference effect on external systems in the vicinity of the handset 12 is reduced.
  • the directional antenna or directional antennas of the stationary radio transceiver can be expediently set differently by means of a direction adjustment device.

Abstract

The radio space to be covered by the stationary radio transmitter/receiver device, e.g. the base station of a wireless telephone, is covered by two or more directional aerials (3, 4) each covering a partial radio space thereof; the directional aerial activated being the one in the partial radio space of which the mobile radio transmitter/receiver device, e.g. the mobile part of the wireless telephone, is located (aerial diversity). This invention can be advantageously used in wireless telephones.

Description

Beschreibungdescription
EINRICHTUNG UNO VERFAHREN ZUR ANTENNENAUSWAHL IN EINEM SCHNURLOSEN TELEFONSYSTEM.DEVICE AND METHOD FOR ANTENNA SELECTION IN A CORDLESS TELEPHONE SYSTEM.
Die Erfindung bezieht sich auf ein Verfahren gemäß dem Ober¬ begriff des Patentanspruchs 1. Außerdem betrifft die Erfin- düng eine Einrichtung zur Durchführung dieses Verfahrens.The invention relates to a method according to the preamble of claim 1. In addition, the invention relates to a device for carrying out this method.
Die Reichweite in einem drahtlosen Kommunikationssystem, z.B. einem schnurlosen Telefon, das aus einer stationären und einer mobilen Funk-Sende-/Empfangseinrichtung besteht, wird im wesentlichen durch seine Sendeleistung und seine Empfän¬ gerempfindlichkeit bestimmt. Dabei wird die Sendeleistung in der Regel in alle Richtungen gleichmäßig, d.h. nahezu kugel¬ förmig, abgestrahlt, um zum einen universell in jeder Umge¬ bung einsetzbar zu sein und zum anderen in jeder Richtung die gleiche Reichweite zu erzielen. Wird jedoch ein einzelner Zeitpunkt betrachtet, so wird aus der Sicht der stationären Funk-Sende-/Empfangseinrichtung, also im Beispiel der Basis¬ station eines schnurlosen Telefons, nur ein Bruchteil der Sendeenergie in Richtung der mobilen Funk-Sende- /Empfangseinrichtung, also im Beispiel dem Mobilteil des schnurlosen Telefons, abgestrahlt. Der weitaus größte Teil der Sendeenergie wird dagegen nicht genutzt und kann auf fremde Geräte sogar störend wirken.The range in a wireless communication system, e.g. A cordless telephone, which consists of a stationary and a mobile radio transceiver, is essentially determined by its transmission power and its receiver sensitivity. The transmission power is usually even in all directions, i.e. almost spherical, radiated, on the one hand to be universally applicable in any environment and on the other hand to achieve the same range in every direction. However, if a single point in time is considered, from the point of view of the stationary radio transceiver, that is to say in the example of the base station of a cordless telephone, only a fraction of the transmission energy is directed in the direction of the mobile radio transceiver, ie in the Example of the cordless telephone handset, emitted. The vast majority of transmission energy, on the other hand, is not used and can even interfere with third-party devices.
Wünschenswert wäre eine stationäre Funk-Sende-A stationary radio transmission would be desirable
/Empfangseinrichtung mit einer scharf bündelnden Richtan¬ tenne, welche die zur Verfügung stehende Energie konzentriert in gerade diejenige Richtung abstrahlt, in der sich die mobi¬ le Funk-Sende-/Empfangseinrichtung augenblicklich befindet. Dazu wäre jedoch ein nicht unerheblicher Aufwand zur Ortung der mobilen Einrichtung, also im Beispiel dem Mobilteil eines schnurlosen Telefons, und zur exakten Ausrichtung der Richt¬ antenne erforderlich./ Receiving device with a sharply focusing directional antenna, which radiates the available energy concentrated in precisely the direction in which the mobile radio transmitting / receiving device is currently located. To do this, however, would be a not inconsiderable effort to locate the mobile device, in the example the handset one cordless telephone, and required for exact alignment of the directional antenna.
Aufgabe der Erfindung ist es, eine erheblich weniger aufwen- dige Möglichkeit zur Verbesserung des Übertragungsverhaltens zwischen der mobilen und der stationären Funk-Sende- /Empfangseinrichtung eines Telekommunikationssystems, insbe¬ sondere eines Schnurlostelefons, zu schaffen.The object of the invention is to create a considerably less complex possibility for improving the transmission behavior between the mobile and the stationary radio transceiver of a telecommunication system, in particular a cordless telephone.
Diese Aufgabe wird bei einem Verfahren gemäß dem Oberbegriff des Patentanspruchs l durch die im kennzeichnenden Teil die¬ ses Patentanspruchs angegebenen Merkmale gelöst.This object is achieved in a method according to the preamble of claim 1 by the features specified in the characterizing part of this claim.
Diese Form von Antennendiversity ist allerdings von jener zu unterscheiden, die eingesetzt wird, um Fadingeffekten entge¬ genzuwirken, und die aus dem deutschen Gebrauchsmuster 92 14 455 bekannt ist. Wird auf Seiten der stationären Funk- Sende-/Empfangseinrichtung des Systems das gemäß der Erfin¬ dung ausgebildete Antennendiversity-Verfahren mit Richtanten- nen durchgeführt, so ist der Einsatz einer Anti-Fading Anten- nendiversity-Anordnung auf seiten der stationären Funk- Sende-/Empfangseinrichtung, also z.B. auf seiten der Basis¬ station eines Schnurlostelefons, nicht möglich, es sei denn, daß jede Richtantenne doppelt ausgeführt werden würde. Die Funktion des bekannten Anti-Fading Antennendiversitys läßt sich jedoch in die mobile Funk-Sende-/Empfangseinrichtung des Systems, also im Beispiel in das Mobilteil eines schnurlosen Telefons, verlagern, bzw. diese Funktion kann auf das Mobil- teil beschränkt werden.However, this form of antenna diversity is to be distinguished from that which is used to counteract fading effects and which is known from German utility model 92 14 455. If the antenna diversity method according to the invention is carried out with directional antennas on the part of the stationary radio transceiver of the system, the use of an anti-fading antenna diversity arrangement on the part of the stationary radio transceiver / Receiving device, for example on the base station of a cordless telephone, not possible, unless each directional antenna would be implemented twice. The function of the known anti-fading antenna diversity can, however, be shifted into the mobile radio transceiver of the system, that is to say in the example in the handset of a cordless telephone, or this function can be restricted to the handset.
Zweckmäßige Weiterbildungen des im Patentanspruch 1 angegebe¬ nen Verfahrens sind in den Ansprüchen 2 bis 4 angegeben.Expedient developments of the method specified in claim 1 are specified in claims 2 to 4.
Eine Einrichtung zur Durchführung des Verfahrens nach der Er- findung sowie vorteilhafte Weiterbildungen und Ausführungs¬ formen sind in den Ansprüchen 5 bis 8 dargelegt. Die Erfindung und ihre wesentlichen Vorteile werden im fol¬ genden anhand von neun Figuren erläutert, die allesamt Strah¬ lungsverteilungen in einer Schnittebene, z.B. der horizonta¬ len Schnittebene, zeigen.A device for performing the method according to the invention as well as advantageous further developments and embodiments are set out in claims 5 to 8. The invention and its essential advantages are explained below with reference to nine figures, all of which show radiation distributions in a sectional plane, for example the horizontal sectional plane.
In Fig. 1 ist der bekannte Fall dargestellt, bei dem mittels einer Rundstrahlantenne 1 die Sendeleistung einer stationären Funk-Sende-/Empfangseinrichtung, z.B. der Basisstation eines schnurlosen Telefons, gleichmäßig in deren Umgebung abgegeben wird bzw. von einer mobilen Funk-Sende-/Empfangseinrichtung, z.B. also dem mobilen Teil des schnurlosen Telefons, stam¬ mende Funksignale von dieser stationären Funk-Sende- /Empfangseinrichtung gleichmäßig rundum empfangen werden. Die Antenne 1 hat somit eine sogenannte Runds rahlCharakteristik 2, mit der in jede Richtung eine gleiche Reichweite A erzielt wird. Bei Betrachtung lediglich eines einzelnen Zeitpunktes wird von der stationären Funk-Sende-/Empfangseinrichtung nur ein Bruchteil der Sendeenergie in Richtung der mobilen Funk- Sende-/Empfangseinrichtung abgestrahlt, wogegen de weitaus größte Teil der Sendeenergie nicht ausgenutzt wird.In Fig. 1 the known case is shown, in which the transmission power of a stationary radio transceiver, e.g. the base station of a cordless telephone, is emitted evenly in its surroundings or by a mobile radio transceiver, e.g. ie the mobile part of the cordless telephone, radio signals originating from this stationary radio transceiver are received uniformly all round. The antenna 1 thus has a so-called round beam characteristic 2, with which the same range A is achieved in every direction. When considering only a single point in time, only a fraction of the transmission energy is emitted by the stationary radio transmission / reception device in the direction of the mobile radio transmission / reception device, whereas the vast majority of the transmission energy is not used.
Fig. 2 zeigt demgegenüber die Aufteilung des gestrichelt dar¬ gestellten Gebiets mit der Reichweite A in zwei Teilräume. Jeder einzelne dieser beiden Teilräume wird von seiten der stationären Funk-Sende-/Empfangseinrichtung von je einer An¬ tenne 3 bzw. 4 mit Richtcharakteristik 5 bzw. 6 ausgeleuch¬ tet. Dabei ist nach Art von Antennendiversity jeweils dieje¬ nige der beiden Richtantennen 3 und 4 aktiv, in deren Teil- raum sich die mobile Funk-Sende-/Empfangseinrichtung befin- det. Da in dem in Fig. 2 dargestellten Fall die Reichweite A gleich bleibt, kann die Sendeleistung und die Empfängeremp¬ findlichkeit der stationären Einrichtung reduziert werden.2 shows the division of the area represented by dashed lines with the range A into two subspaces. Each of these two subspaces is illuminated on the part of the stationary radio transceiver by an antenna 3 or 4 with directional characteristics 5 or 6. In this case, depending on the type of antenna diversity, that of the two directional antennas 3 and 4 is active, in the sub-area of which the mobile radio transceiver is located. Since the range A remains the same in the case shown in FIG. 2, the transmission power and the receiver sensitivity of the stationary device can be reduced.
Ein Vergleich der Fig. 3, in der in ÜTaereinstimmung mit Fig. 1 die Rundstrahlcharakteristik 2 einer Antenne 1 einer sta¬ tionären Funk-Sende-/Empfangseinrichtung, also z.B. der Ba¬ sisstation eines schnurlosen Telefons, mit der Reichweite A dargestellt ist, mit der Fig. 4, in der über jeweils eine de beiden Richtantennen 7 und 8 jeweils bei Aktivschaltung die gleiche Energie abgestrahlt {Sendefall) wird bzw. die gleich Empfängerempfindlichkeit (Empfangsfall) wie im Fall nach Fig. 3 besteht, zeigt, daß die dann erreichte Reichweite A' gegen¬ über der Reichweite A nach Fig. 3 um den Faktor V2 bei Frei- raumausbreitung erhöht wird. Die Figuren 3 und 4 zeigen also den zu erwartenden Reichweitengewinn bei einem gemäß der Er¬ findung durchgeführten Antennendiversity und unveränderter Sendeleistung/Empfängerempfindlichkeit. Im Beispiel nach Fig. 4 ist zum dargestellten Zeitpunkt die mit durchgezogener Li¬ nie dargestellte Antennencharakteristik 9 der Richtantenne 7 aktiv geschaltet, wogegen die gestrichelt dargestellte Anten¬ nencharakteristik 10 der Richtantenne 8 im Augenblick nicht aktiv ist, da sich die mobile Funk-Sende-/Empfangseinrichtun in dem von der Richtantenne 7 abgedeckten Teilfunkraum mit der Reichweite A' befindet.A comparison of FIG. 3, in which, in accordance with FIG. 1, the omnidirectional characteristic 2 of an antenna 1 of a stationary radio transceiver, that is, for example, the base station of a cordless telephone, with the range A 4, in which the same energy is emitted (transmission case) via one of the two directional antennas 7 and 8, respectively when the circuit is activated, or which shows the same receiver sensitivity (reception case) as in the case according to FIG. 3, that the range A 'then reached is increased compared to the range A according to FIG. 3 by the factor V2 with free space expansion. FIGS. 3 and 4 thus show the range gain to be expected with an antenna diversity carried out according to the invention and unchanged transmission power / receiver sensitivity. In the example according to FIG. 4, the antenna characteristic 9 of the directional antenna 7 shown with a solid line is actively switched, whereas the dashed antenna characteristic 10 of the directional antenna 8 is not active at the moment, since the mobile radio transmission / Receiving device is located in the radio area covered by the directional antenna 7 with the range A '.
Es ist also festzustellen, daß eine Konzentration der Sende- leistung auf eine Halbkugel der Verdoppelung der in diese Halbkugel abgestrahlten Leistung entspricht. Eine Verdoppe¬ lung der Sendeleistung entspricht somit einer Erhöhung der Reichweite um den Faktor V2.It should therefore be noted that a concentration of the transmission power on a hemisphere corresponds to the doubling of the power radiated into this hemisphere. A doubling of the transmission power thus corresponds to an increase in the range by a factor of V2.
Anhand der Figuren 5 bis 9 werden wesentliche Vorteile des Verfahrens nach der Erfindung für ein aus einer Basisstation 11 und einem Mobilteil 12 bestehendes schnurloses Telefon er¬ läutert. Im üblichen Fall, der in Fig. 5 dargestellt ist, weisen die Basisstation 11 und der Mobilteil 12 jeweils eine Antenne mit Rundstrahlcharakteristik 13 bzw. 14 auf. Der Ab¬ stand B zwischen der Basisstation 11 und dem Mobilteil 12 in diesem Beispiel ist so bemessen, daß bei den vorgesehenen Reichweiten gerade noch Funkkommunikation durchgeführt werde kann.5 to 9, essential advantages of the method according to the invention for a cordless telephone consisting of a base station 11 and a mobile part 12 are explained. In the usual case, which is shown in FIG. 5, the base station 11 and the mobile part 12 each have an antenna with omnidirectional characteristics 13 and 14, respectively. The distance B between the base station 11 and the mobile part 12 in this example is dimensioned such that radio communication can still be carried out at the intended ranges.
Fig. 6 zeigt nun den Fall, wie nach der Erfindung bei gegen¬ über dem Fall nach Fig. 5 unveränderter Sendelei-stung bzw. Empfängerempfindlichkeit durch Verwendung einer Antenne mit einer Richtcharakteristik 15 in der Basisstation 11 die Reichweite des Kommunikationssystems, im dargestellten Fall also des schnurlosen Telefons, um den Faktor 2 bei Frei- raumausbreitung erhöht wird. Der Mobil eil 12 wird dann von der Basisstation 11 noch erreicht, wenn deren Abstand erheb¬ lich größer ist als der Abstand B im Fall nach Fig. 5, welche den Iststand vor der Erfindung zeigt. Wird das Verfahren nach der Erfindung nicht zur Erhöhung der Reichweite eingesetzt wie nach Fig. 6, so können die Anforderungen an die Empfän- gerempfindlichkeit der Basisstation 11 und des Mobilteils 12 reduziert werden, woraus sich in der Regel Möglichkeiten zur Kostenreduzierung ergeben. Diesen Fall zeigt Fig. 7, worin der Bereich, in dem das Sendesignal einen Normpegel nicht un- terschreitet, jeweils mit einer durchgezogenen Linie und der Bereich, in dem ein Signal mit mindestens Normpegel empfangen werden kann, mit gestrichelten Linien dargestellt ist. Die Basisstation 11 sendet also hier mit einer durch den Gewinn der Richtcharakteristik 16 erhöhten Strahlungsleistung, so daß die gestrichelt dargestellte Empfindlichkeit des Empfän¬ gers des Mobilteils 12 verringert werden kann. Umgekehrt läßt sich bei Aussendung von Signalen von seiten des Mobilteils 12 aufgrund der Verwendung einer Richtantenne in der Basissta¬ tion 11 deren Empfängerempfindlichkeit ebenso reduzieren, da die verringerte Richtcharakteristik 17 (gestrichelt darge¬ stellt) immer noch ausreicht, um vom Mobilteil 10 ausgesen¬ dete Signale einwandfrei zu empfangen.6 now shows the case as in the invention with the transmission power or the transmission power unchanged compared to the case in FIG. Receiver sensitivity by using an antenna with a directional characteristic 15 in the base station 11 increases the range of the communication system, in the case shown the cordless telephone, by a factor of 2 in the case of free space expansion. The mobile line 12 is still reached by the base station 11 if its distance is considerably greater than the distance B in the case according to FIG. 5, which shows the actual state prior to the invention. If the method according to the invention is not used to increase the range as shown in FIG. 6, the requirements for the receiver sensitivity of the base station 11 and of the handset 12 can be reduced, which generally results in possibilities for reducing costs. FIG. 7 shows this case, in which the area in which the transmission signal does not fall below a standard level is shown in each case with a solid line and the area in which a signal with at least standard level can be received is shown with dashed lines. The base station 11 therefore transmits here with a radiation power increased by the gain of the directional characteristic 16, so that the sensitivity of the receiver of the handset 12 shown in dashed lines can be reduced. Conversely, when signals are emitted on the part of the handset 12, the use of a directional antenna in the base station 11 can also reduce its receiver sensitivity, since the reduced directional characteristic 17 (shown in dashed lines) is still sufficient to be transmitted by the handset 10 Receive signals properly.
Wird das Verfahren nach der Erfindung nicht zur Erhöhung der Reichweite eingesetzt, so kann alternativ zur Reduzierung der Empfängerempfindlichkeit, was anhand der Fig. 7 erklärt wurde, die Sendeleistung in der Basisstation 11 und im Mobil- teil 12 reduziert werden. Dieser Fall ist in Fig. 8 darge¬ stellt. Wegen des niedrigeren Energiebedarfs führt dies zu einer Erhöhung der Betriebsdauer des akkugespeisten Mobil- teils 12. In Fig. 8 ist der Bereich, in dem das Sendesignal einen Normpegel nicht unterschreitet, mit durchgezogener Li- nie und der Bereich, in dem ein Signal mit mindestens Normpe gel empfangen werden kann, mit gestrichelter Linie darge¬ stellt. Im Fall von Sendungen von seiten der Basisstation 11 genügt aufgrund der Verwendung einer Richtcharakteristik 18 dort eine kleinere Sendeleistung zum funkmäßigen Erreichen des Mobilteils 12. Soll dagegen mit der Basisstation 11 emp¬ fangen werden, dann genügt eine verkleinerte Sendeleistung des Mobilteils 12, da die Basisstation 11 mit der gestrichel dargestellten Richtcharakteristik 19 eine erhöhte Empfangs- empfindlichkeit aufweist.If the method according to the invention is not used to increase the range, as an alternative to reducing the receiver sensitivity, which was explained with reference to FIG. 7, the transmission power in the base station 11 and in the handset 12 can be reduced. This case is shown in FIG. 8. Because of the lower energy requirement, this leads to an increase in the operating time of the battery-powered handset 12. In FIG. 8, the area in which the transmission signal does not fall below a standard level is shown with a solid line. Never and the area in which a signal with at least Normpe gel can be received is shown with a dashed line. In the case of transmissions on the part of the base station 11, a smaller transmission power is sufficient there to reach the handset 12 by radio due to the use of a directional characteristic 18 11 with the directional characteristic 19 shown in dashed lines has an increased reception sensitivity.
Ganz allgemein gilt, daß sich durch den Einsatz des Verfah¬ rens nach der Erfindung eine Reduzierung der Störstrahlung ergibt. Es wird nämlich in denjenigen Teilraum, in dem sich das Mobilteil 12 nicht befindet, keine Leistung abgestrahlt, d.h. fremde Geräte innerhalb dieses Teilraumes werden nicht gestört. Wird das Verfahren der Erfindung nicht zur Reichwei tenerhöhung verwendet, dann kann - wie bereits vorher ausge¬ führt wurde - die Sendeleistung des Mobilteils 12 reduziert werden. Dadurch verringert sich die Störwirkung auf fremde Systeme in der Umgebung des Mobilteils 12.The general rule is that the use of the method according to the invention results in a reduction of the interference radiation. This is because no power is emitted in the sub-room in which the handset 12 is not located, i.e. third-party devices within this subspace are not disturbed. If the method of the invention is not used to increase the range, then the transmission power of the handset 12 can be reduced, as has already been explained above. This reduces the interference effect on external systems in the vicinity of the handset 12.
Anhand der Fig. 9 soll im folgenden noch erläutert werden, daß auch die Möglichkeit besteht, die verschiedenen Vorteile des Verfahrens nach der Erfindung im Mobilteil 12 zu verei¬ nen.9, it will be explained in the following that there is also the possibility of combining the various advantages of the method according to the invention in the mobile part 12.
Die Sendeleistung und die Empfängerempfindlichkeit der Basis Station 11 bleiben bis zum Antennenanschlußpunkt unverändert Durch die in einem Teilfunkraum einen Gewinn bringende Richt charakteristik 20 der Richtantenne steigen jedoch effektiv i diesem Teilfunkraum sowohl die Strahlungsleistung als auch die Empfängerempfindlichkeit.The transmission power and the receiver sensitivity of the base station 11 remain unchanged up to the antenna connection point. However, due to the gaining directional characteristic 20 of the directional antenna in a partial radio space, both the radiation power and the receiver sensitivity effectively increase in this partial radio space.
Die "größere" effektive Sendeleistung der Basisstation 11 er möglicht die Reduzierung der Empfängerempfindlichkeit des Mo bilteils 12. Da es vorgesehen ist, daß eine Basisstation 11 den Kontakt zu mehreren Mobilteilen hält, kommt die Kosten¬ einsparung im Empfänger des Mobilteils 12 mehrfach zum Tra¬ gen.The "larger" effective transmission power of the base station 11 makes it possible to reduce the receiver sensitivity of the mobile part 12. Since it is provided that a base station 11 keeps in contact with several handsets, the cost saving in the receiver of the handset 12 comes into play several times.
Die "größere" effektive Empfindlichkeit der Basisstation 11 ermöglicht auch die Reduzierung der Sendeleistung des Mobil- teils 12. Dadurch wird zum einen die Leistungsaufnahme des Mobilteils 12 verringert, d.h. es ergibt sich eine längere Betriebsdauer oder aber man kommt mit einem kleineren und da- mit günstigeren Akku aus. Zum anderen wird die Störwirkung auf fremde Systeme in der Nähe des Mobilteils 12 reduziert.The "greater" effective sensitivity of the base station 11 also enables the transmission power of the handset 12 to be reduced. On the one hand, this reduces the power consumption of the handset 12, i.e. this results in a longer operating time or you can get by with a smaller and therefore cheaper battery. On the other hand, the interference effect on external systems in the vicinity of the handset 12 is reduced.
Die Richtantenne oder Richtantennen der stationären Funk- Sende-/Empfangseinrichtung lassen sich in zweckmäßiger Weise mittels einer Richtungsverstelleinrichtung unterschiedlich einstellen.The directional antenna or directional antennas of the stationary radio transceiver can be expediently set differently by means of a direction adjustment device.
Als verstellbare Richtantennen können vorteilhaft sogenannte Quick-Heading-Beam-Antennen verwendet werden, die als eine Weiterentwicklung des vertikalen Halbwellenrichtstrahlers an¬ zusehen sind und jeweils aus einem vertikalen Halbwellen- strahler mit vier Parasitärelementen bestehen, die im Abstand von je 0,15 λ (λ = Wellenlänge) vom Halbwellenstrahler ange¬ ordnet sind und deren Längen so umgeschaltet werden, daß sie wahlweise entweder als Direktoren oder Reflektoren wirken. Auf diese Weise erreicht man, daß der Richtstrahler mit sei¬ ner Hauptstrahlung durch entsprechendes Umschalten alle Rich¬ tungen bestreicht, ohne die Antenne mechanisch zu drehen. In seiner Wirkung entspricht die Quick-Heading-Beam-Antenne etwa einer 3-Elemente-Yagi-Antenne. So-called quick-heading beam antennas can advantageously be used as adjustable directional antennas, which are to be regarded as a further development of the vertical half-wave directional radiator and each consist of a vertical half-wave radiator with four parasitic elements which are spaced apart by 0.15 λ ( λ = wavelength) are arranged by the half-wave radiator and their lengths are switched so that they act either as directors or reflectors. In this way it is achieved that the directional emitter with its main radiation sweeps through all directions by appropriately switching without mechanically rotating the antenna. In its effect, the quick-heading beam antenna corresponds approximately to a 3-element Yagi antenna.

Claims

Patentansprüche claims
1. Verfahren zur Signalübertragung in einem Kommunikationssy stem zwischen einer mobilen, mit einer Antenneneinrichtung versehenen Funk-Sende-/Empfangseinrichtung, insbesondere dem Mobilteil eines schnurlosen Telefons, und einer stationären, gleichfalls mit einer Antenneneinrichtung versehenen Funk- Sende-/Empfangseinrichtung, insbesondere der Basisstation eines schnurlosen Telefons, d a d u r c h g e k e n n z e i c h n e t , daß der von der stationären Funk-Sende-/Empfangseinrichtung zu erfassende Funkraum von zwei oder mehr jeweils einen Teil funkraum davon abdeckenden Richtantennen (3,4) ausgeleuchtet wird, welche die Antenneneinrichtung der stationären Funk- Sende-/Empfangseinrichtung bilden, und daß nach Art von An- tennendiversity jeweils diejenige der Richtantennen aktivier wird, in deren Teilfunkraum sich die mobile Funk-Sende- /Empfangseinrichtung befindet.1. Method for signal transmission in a Kommunikationssy stem between a mobile, provided with an antenna device radio transceiver, in particular the handset of a cordless telephone, and a stationary, also provided with an antenna device radio transceiver, especially the base station of a cordless telephone, characterized in that the radio space to be detected by the stationary radio transceiver is illuminated by two or more directional antennas (3, 4) each covering a part of the radio space, which antenna antenna of the stationary radio transceiver form, and that according to the type of antenna diversity that one of the directional antennas is activated, in the partial radio space of which the mobile radio transceiver is located.
2. Verfahren nach Anspruch l, d a d u r c h g e k e n n z e i c h n e t , daß die Summe der von allen Richtantennen (3,4) der stationä ren Funk-Sende-/Empfangseinrichtung abgedeckten Teilfunkräum einen zumindest angenähert punktsymmetrischen Funkraum bil- det.2. The method as claimed in claim 1, so that the sum of the partial radio spaces covered by all directional antennas (3, 4) of the stationary radio transceiver forms an at least approximately point-symmetrical radio space.
3. Verfahren nach Anspruch 1, g e k e n n z e i c h n e t d u r c h eine z.B. manuell durchführbare Ausrichtbarkeit der Richtan- tennen (7,8), so daß der von ihnen ausgeleuchtete Funkraum a die jeweils vorliegende Umgebung, z.B. ein Gebäude, angepaßt werden kann.3.The method according to claim 1, g e k e n n z e i c h n e t d u r c h a e.g. manually adjustable directionality of the directional antennas (7,8) so that the radio room a illuminated by them matches the current environment, e.g. a building that can be customized.
4. Verfahren nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Auswahl der jeweils zu aktivierenden Richtantenne (3,4) anhand von vergleichenden Messungen der Empfangsfeld- stärke in der stationären Funk-Sende-/Empfangseinrichtung vorgenommen wird.4. The method according to any one of the preceding claims, characterized in that the selection of the directional antenna (3, 4) to be activated in each case on the basis of comparative measurements of the reception field. strength is carried out in the stationary radio transceiver.
5. Einrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Antenneneinrichtung der stationären Funk-Sende- /Empfangseinrichtung mit zwei oder mehr Richtantennen (3,4) ausgestattet ist, von denen jede einen Teilfunkraum des von der stationären Funk-Sende-/Empfangseinrichtung zu erfassen¬ den Funkraumes abdeckt und daß jeweils diejenige Richtantenne aktiviert ist, in deren Teilfunkraum sich die mobile Funk- Sende-/Empfangseinrichtung befindet.5. Device for performing the method according to any one of the preceding claims, characterized in that the antenna device of the stationary radio transceiver is equipped with two or more directional antennas (3,4), each of which has a partial radio space from the stationary radio Transceiver device to be covered covers the radio space and that that directional antenna is activated in each case in the partial radio space of which the mobile radio transceiver device is located.
6. Einrichtung nach Anspruch 5, g e k e n n z e i c h n e t d u r c h eine Richtungsverstelleinrichtung für die Richtantennen (7,8) der stationären Funk-Sende-/Empfangseinrichtung.6. The device according to claim 5, a directional adjustment device for the directional antennas (7,8) of the stationary radio transceiver.
7. Einrichtung nach einem der Ansprüche 5 oder 6, d a d u r c h g e k e n n z e i c h n e t , daß in der Funk-Sende-/Empfangseinrichtung eine Meßeinrich¬ tung vorgesehen ist, mittels welcher die Empfangsfeidstärken der über die einzelnen Richtantennen (3,4) einfallenden, von einer mobilen Funk-Sende-/Empfangseinrichtung kommenden Si¬ gnale gemessen werden, und daß eine Vergleichs- und Auswahl- einrichtung vorgesehen ist, welche die Empfangsfeldstärken vergleicht und die größte davon ermittelt, so daß diejenige Richtantenne aktiviert wird, an welcher die größte Empfangs- feidstärke vorliegt.7. Device according to one of claims 5 or 6, characterized in that in the radio transmitting / receiving device a Meßeinrich¬ device is provided, by means of which the reception field strengths of the incident via the individual directional antennas (3,4) from a mobile radio Transmit / receive device incoming signals are measured, and that a comparison and selection device is provided which compares the received field strengths and determines the largest of them, so that the directional antenna is activated at which the greatest reception field strength is present.
8. Einrichtung nach einem der Ansprüche 5 bis 7, d a d u r c h g e k e n n z e i c h n e t , daß die Richtantennen (7,8) der stationären Funk-Sende- /Empfangseinrichtung durch sogenannte Quick-Heading-Beam-An¬ tennen gebildet sind, die jeweils aus einem vertikalen Halb- wellenstrahler mit vier Parasitärelementen bestehen, die im 96/22646 PCI7DE96/000208. Device according to one of claims 5 to 7, characterized in that the directional antennas (7,8) of the stationary radio transceiver are formed by so-called quick-heading beam antennas, each consisting of a vertical half wave emitters with four parasitic elements exist in the 96/22646 PCI7DE96 / 00020
10 Abstand von je 0,15 λ (λ = Wellenlänge) vom Halbwellenstrah- ler angeordnet sind und deren Längen so umgeschaltet werden, daß sie wahlweise entweder als Direktoren oder Reflektoren wirken. 10 distances of 0.15 λ (λ = wavelength) from the half-wave radiator are arranged and their lengths are switched so that they act either as directors or reflectors.
PCT/DE1996/000020 1995-01-20 1996-01-10 Device and process for aerial selection in a wireless telephone system WO1996022646A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU43845/96A AU4384596A (en) 1995-01-20 1996-01-10 Device and process for aerial selection in a wireless telephone system
CA002210876A CA2210876C (en) 1995-01-20 1996-01-10 Method for signal transmission between a mobile and a stationary radio transmission/reception means of a wireless communication system and apparatus for the implementation of this method
EP96900261A EP0804849B1 (en) 1995-01-20 1996-01-10 Device and process for aerial selection in a wireless telephone system
JP8521962A JPH10502784A (en) 1995-01-20 1996-01-10 Method for transmitting a signal between a mobile radio communication device and a fixed radio transmission / reception device and an apparatus for implementing the method
US08/860,902 US6219563B1 (en) 1995-01-20 1996-01-10 Method for signal transmission in a communication system between a mobile radio transmission/reception device and a stationary radio transmission/reception device
DE59611405T DE59611405D1 (en) 1995-01-20 1996-01-10 DEVICE AND METHOD FOR ANTENNA SELECTION IN A CORDLESS TELEPHONE SYSTEM

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19501688.2 1995-01-20
DE19501688 1995-01-20

Publications (1)

Publication Number Publication Date
WO1996022646A1 true WO1996022646A1 (en) 1996-07-25

Family

ID=7751950

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/000020 WO1996022646A1 (en) 1995-01-20 1996-01-10 Device and process for aerial selection in a wireless telephone system

Country Status (10)

Country Link
US (1) US6219563B1 (en)
EP (1) EP0804849B1 (en)
JP (1) JPH10502784A (en)
CN (1) CN1108033C (en)
AU (1) AU4384596A (en)
CA (1) CA2210876C (en)
DE (1) DE59611405D1 (en)
ES (1) ES2275271T3 (en)
RU (1) RU2152688C1 (en)
WO (1) WO1996022646A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027659A1 (en) * 1997-11-21 1999-06-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for receiving radio signals
US8423084B2 (en) 2001-11-01 2013-04-16 Airgain, Inc. Method for radio communication in a wireless local area network and transceiving device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987769B1 (en) 1999-09-08 2006-01-17 Qwest Communications International Inc. System and method for dynamic distributed communication
US6831902B1 (en) 1999-09-08 2004-12-14 Qwest Communications International, Inc. Routing information packets in a distributed network
US7388846B1 (en) 1999-09-08 2008-06-17 Qwest Communications International Inc. Cellularized packetized voice and data
US6816706B1 (en) 1999-09-08 2004-11-09 Qwest Communications International, Inc. Wireless communication access point
US8005077B1 (en) 1999-09-08 2011-08-23 Qwest Communications International Inc. Distributively routed VDSL and high-speed information packets

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237531A (en) * 1985-04-12 1986-10-22 Mitsubishi Electric Corp Mobile radio system
JPH01202036A (en) * 1988-02-08 1989-08-15 Toshiba Corp Radio communication system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01300634A (en) 1988-05-30 1989-12-05 Nippon Telegr & Teleph Corp <Ntt> Sector zone control system in mobile communication
US5021801A (en) 1989-09-05 1991-06-04 Motorola, Inc. Antenna switching system
JPH04238424A (en) 1991-01-22 1992-08-26 Nippon Telegr & Teleph Corp <Ntt> Minimum micro cell system
JP2614789B2 (en) 1991-03-28 1997-05-28 太洋無線株式会社 Yagi antenna
US5303240A (en) * 1991-07-08 1994-04-12 Motorola, Inc. Telecommunications system using directional antennas
US5752164A (en) * 1992-04-27 1998-05-12 American Pcs L.P. Autonomous remote measurement unit for a personal communications service system
FR2705849B1 (en) * 1993-05-28 1995-06-30 Alcatel Mobile Comm France Base station of a GSM type cellular network, and method of exchanging data between this base station and a mobile operating in the network.
US5740526A (en) * 1994-06-01 1998-04-14 Bonta; Jeffrey D. Method and apparatus for selecting two antennas from which to receive a communication signal
US5617102A (en) * 1994-11-18 1997-04-01 At&T Global Information Solutions Company Communications transceiver using an adaptive directional antenna
US5835859A (en) * 1995-10-13 1998-11-10 Airnet Communications Corporation Method for frequency allocation and assignment in wireless communication systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237531A (en) * 1985-04-12 1986-10-22 Mitsubishi Electric Corp Mobile radio system
JPH01202036A (en) * 1988-02-08 1989-08-15 Toshiba Corp Radio communication system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
P.E.MOGENSEN ET AL.: "ANTENNA CONFIGURATION MEASUREMENTS FOR DECT MICRO-CELLS", WIRELESS NETWORKS - CATCHING THE MOBILE FUTURE - 5TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC 94), AND ICCC REGIONAL MEETING ON WIRELESS COMPUTER NETWORKS (WCN), PROCEEDINGS OF WIRELESS NETWORKS CATCHING, vol. 4, 18 September 1994 (1994-09-18) - 23 September 1994 (1994-09-23), AMSTERDAM NL, pages 1075 - 1080 vol.4, XP000571909 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 083 (E - 489) 13 March 1987 (1987-03-13) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 503 (E - 844) 13 November 1989 (1989-11-13) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027659A1 (en) * 1997-11-21 1999-06-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for receiving radio signals
US6650910B1 (en) 1997-11-21 2003-11-18 Telefonaktiebolaget Lm Ericsson Methods and apparatus in antenna diversity systems for estimation of direction of arrival
US8423084B2 (en) 2001-11-01 2013-04-16 Airgain, Inc. Method for radio communication in a wireless local area network and transceiving device

Also Published As

Publication number Publication date
AU4384596A (en) 1996-08-07
EP0804849A1 (en) 1997-11-05
JPH10502784A (en) 1998-03-10
CN1108033C (en) 2003-05-07
CN1168209A (en) 1997-12-17
CA2210876A1 (en) 1996-07-25
US6219563B1 (en) 2001-04-17
CA2210876C (en) 2006-12-19
EP0804849B1 (en) 2006-12-20
ES2275271T3 (en) 2007-06-01
RU2152688C1 (en) 2000-07-10
DE59611405D1 (en) 2007-02-01

Similar Documents

Publication Publication Date Title
DE60312491T2 (en) IMPROVED DIVERSITY RADIO COMMUNICATION DEVICE
EP0729285B1 (en) Carrier frequency allocation in a SDMA radio system
DE69737932T2 (en) METHOD AND DEVICE FOR INTERFERENCE SUPPRESSION AND DOWN-LINE IRONING IN A CELLULAR RADIO COMMUNICATION SYSTEM
DE69734385T2 (en) Wireless communication systems
DE60222779T2 (en) Communication control method and apparatus in a mobile communication system
DE4141398C2 (en) Method for improving the radio cell illumination in a cellular mobile radio system and device for carrying out the method
DE102007029952B4 (en) Information transmission device
DE69915196T2 (en) PORTABLE RADIO DEVICE WITH STATUS DEPENDENT CONTROL OF NON-UNIFORM SELECTION CHARACTERISTICS UNDER POSSIBLE ANTENNA TRACKING CHARACTERISTICS
DE69733005T2 (en) ANTENNA DEVICE
EP0662255A1 (en) Radio antenna arrangement on the window pane of a motor vehicle
DE69831323T2 (en) COMBINATION OF BUTLER RADIATION CONNECTORS FOR HEXAGONAL CELL COVERING
DE60017169T2 (en) ANTENNA ARRANGEMENT WITH ACTIVE ELEMENT AND REFLECTOR
EP1045472A2 (en) Radiotelephone system with antenna array for vehicles
DE102018002661A1 (en) Antenna device for bidirectional communication on vehicles
EP1341260A1 (en) Antenna for receiving satellite and/or terrestrial radio signals in cars
WO1998054788A1 (en) Antenna for high frequency radio signal transmission
WO1996022646A1 (en) Device and process for aerial selection in a wireless telephone system
DE69733894T2 (en) INTERSTITIAL SECTOR ASSEMBLY
EP0679318A1 (en) Uhf-waveband radio-antenna assembly for vehicles
DE19951524C1 (en) Beam shaping method in a radio communication system
EP2862234B1 (en) Active antenna system
US4340891A (en) Dual polarized base station receive antenna
DE10328570A1 (en) Method for reducing the radiation load by a mobile radio terminal with directional radiation and mobile radio terminal with directional radiation
EP1394896A1 (en) Controlling of an antenna array with sectorised radiation pattern to improve signal quality for mobile stations on beam boudaries
DE69633759T2 (en) antenna device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 96191496.3

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA CN JP RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1996900261

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 08860902

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2210876

Country of ref document: CA

Ref document number: 2210876

Country of ref document: CA

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 1996900261

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1996900261

Country of ref document: EP